CN104609448A - Treatment method for potassium nitrate wastes - Google Patents
Treatment method for potassium nitrate wastes Download PDFInfo
- Publication number
- CN104609448A CN104609448A CN201510036419.7A CN201510036419A CN104609448A CN 104609448 A CN104609448 A CN 104609448A CN 201510036419 A CN201510036419 A CN 201510036419A CN 104609448 A CN104609448 A CN 104609448A
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- saltpetre
- potassium nitrate
- waste material
- wastes
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D9/00—Nitrates of sodium, potassium or alkali metals in general
- C01D9/16—Purification
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
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- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention relates to the technical field of chemical industry, in particular to a treatment method for potassium nitrate wastes. The method comprises the following steps: (a) collecting the potassium nitrate wastes generated during chemical enhanced treatment of glass, and adding water for mixing to obtain dilute waste liquor, wherein the concentration of potassium nitrate in the dilute waste liquor is 40-70%; (b) heating the dilute waste liquor to 50-100 DEG C for fully dissolving, performing filtration treatment on dissolved liquor to remove sodium nitrate and other impurities, cooling filter liquor obtained by filtering to lower than a room temperature, crystallizing, dewatering, and drying to obtain potassium nitrate powder. The potassium nitrate wastes are treated with the method for diluting and heating for dissolving, and then the filtration treatment is adopted for removing a relatively large amount of sodium nitrate, impurities and the like in the potassium nitrate wastes, so that the concentration of potassium nitrate in a potassium nitrate solution can be increased, a purification effect is achieved, and the obtained potassium nitrate powder can be sold as a product; specifically, the market price of existing potassium nitrate byproduct wastes is 1,000 yuan/ton, and the price of the potassium nitrate powder obtained after the potassium nitrate wastes are treated with the method disclosed by the invention is 10,000 yuan/ton.
Description
Technical field
The present invention relates to chemical technology field, be specifically related to a kind for the treatment of process of saltpetre waste material.
Background technology
Glass reinforced is a kind of glass secondary processing technique, namely the chemical constitution by changing glass surface improves the intensity of glass, at present, glass reinforcedly be divided into physical strengthening method and chemical enhanced method, and chemical enhanced method mainly contains ion exchange method, dealkalize method and surface crystallization method etc., wherein, ion exchange method is the conventional means of chilled glass, this reinforcing process flow process is: acid liquid corrosion → saltpetre strengthening → cleaning → dry, concrete, first glass substrate is placed in acid solution to soak, with the glass on its top layer of erosion removal and impurity, and then the saltpetre being placed in temperatures as high 400 DEG C soaks, exchange to make the potassium ion in the sodium ion of glass surface and aqueous saltpetre and then form strengthening layer at glass surface, such postorder cleans glass again, the glass of high strength can be obtained after drying treatment.
At present, when glass reinforced processing enterprise adopts ion exchange method to strengthen glass, the waste liquid that aqueous saltpetre produces after soaking glass is solid fraction waste material under being placed in normal temperature, the saltpetre waste material of these solid fraction is gone to waste treatment plants to carry out heat, decompression, concentration, to reduce environmental pollution by enterprise.But, not only cost is high but also recovery process complicated for the saltpetre waste material adopting above-mentioned traditional method recycling chilled glass to produce, therefore the recycling of saltpetre waste material how is realized, improve the economic benefit of enterprise, this is one of problem of always studying of current person skilled in art.
Summary of the invention
The object of this invention is to provide the treatment process of the saltpetre waste material that a kind of intensive treatment glass produces, the processing condition of the method treatment of nitric acid potassium waste material are simple, the time is short, cost is low.
For achieving the above object, the technical solution used in the present invention is: a kind for the treatment of process of saltpetre waste material, and its step is as follows:
A) collect the saltpetre waste material that chemical intensification treatment glass produces, add water mixing, obtains dilution waste liquid, and the saltpetre concentration in described dilution waste liquid is 40%-70%;
B) dilution waste liquid is heated to 50-100 DEG C, until completely dissolved, lysate is removed SODIUMNITRATE by filtration treatment, the filtrate of filtering is down to below room temperature, then carries out crystallization, dehydration, drying, obtains saltpetre powder.
In fact, when adopting saltpetre intensive treatment glass, mainly by the ion exchange between the potassium ion in aqueous saltpetre and the sodium ion of glass surface, and then form strengthening layer at glass surface, therefore the sodium ions content in the saltpetre waste material after intensive treatment glass is more, the present invention adopts dilution, the method of heating for dissolving processes saltpetre waste material, then the SODIUMNITRATE adopting filtration treatment removing content wherein more and other impurity etc., so can improve the saltpetre purity in saltpetre waste material, and then realize refining effect, make the saltpetre powder obtained can as production marketing, concrete, the commercially available price of existing saltpetre waste material is 1000 yuan/ton, and the saltpetre powder price obtained after method disclosed by the invention processes is 10000 yuan/ton.Method technique disclosed by the invention is simple, glass processing enterprise directly can carry out the recycling of saltpetre waste material on the spot, effectively improve the economic benefit of enterprise, in addition, the heating energy source of described dilution waste material also can make full use of the existing resource of enterprise, such as, hydrofluoric acid for etching glass substrate can produce a large amount of heats when diluting, these heats are collected then for diluting the heating of waste liquid by water coolant, after heating dilution waste liquid, the cold water that produces can circulate again the dilution cooling carrying out hydrofluoric acid again, thus realize making full use of of energy.
Concrete, saltpetre waste material mixes with water according to the mass ratio of 6:3-7 by described step a, waste liquid must be diluted, saltpetre purity in described saltpetre waste material is 80%-99.7%, in other words, actual in adding water in saltpetre waste material, it is the add-on suitably adjusting water according to the saltpetre purity in saltpetre waste material, to ensure the abundant dissolving guaranteeing saltpetre waste material in the scope of limited water add-on, so both ensure reliably carrying out of technique, reduce again postorder to filter, the workload of dehydration, thus improve the processing efficiency of saltpetre waste material.
As further preferred version: the filtrate in described step b adopts ice maker to cool to 0-30 DEG C; Lysate in described step b is the capable filtration of filter membrane adopting aperture 1-100um; Described filter membrane is softener resin material, adopts softener resin material directly can carry out absorptive collection to the SODIUMNITRATE in lysate and calcium, magnesium plasma, and then the saltpetre concentration in raising filtrate.Analyze after testing, the saltpetre concentration in the saltpetre waste material that current glass processing enterprise chilled glass produces is all between 80%-99.7%, and the purity processing saltpetre in the saltpetre powder obtained under above-mentioned parameter condition can up to 99.9%.
Embodiment
1-3 is further described technical scheme disclosed by the invention by the following examples:
Embodiment 1:
A) collect the saltpetre waste material that chemical intensification treatment glass produces, mixed with water by saltpetre waste material according to the mass ratio of 6:3, obtain dilution waste liquid, the saltpetre concentration in described saltpetre waste material is 90%-99%;
B) dilution waste liquid is heated to 50-100 DEG C, until completely dissolved, lysate is crossed by the softener resin that aperture is 1-100um and filters SODIUMNITRATE, the filtrate of filtering is down to 10-30 DEG C, then crystallization, dehydration, drying is carried out, obtain saltpetre powder, after testing, in this saltpetre powder, the purity of saltpetre is 99.97%.
Embodiment 2:
A) collect the saltpetre waste material that chemical intensification treatment glass produces, mixed with water by saltpetre waste material according to the mass ratio of 6:5, obtain dilution waste liquid, the saltpetre concentration in described saltpetre waste material is 86%-88%;
B) dilution waste liquid is heated to 70-90 DEG C, until completely dissolved, lysate is crossed by the softener resin that aperture is 1-100um and filters SODIUMNITRATE, the filtrate of filtering is down to 10-30 DEG C, then crystallization, dehydration, drying is carried out, obtain saltpetre powder, after testing, in this saltpetre powder, the purity of saltpetre is 99.99%.
Embodiment 3:
A) collect the saltpetre waste material that chemical intensification treatment glass produces, mixed with water by saltpetre waste material according to the mass ratio of 6:7, obtain dilution waste liquid, the saltpetre concentration in described saltpetre waste material is 88%-90%;
B) dilution waste liquid is heated to 50-100 DEG C, until completely dissolved, lysate is crossed by the softener resin that aperture is 1-100um and filters SODIUMNITRATE, the filtrate of filtering is down to 15-20 DEG C, then carry out dewatering, crystallization, drying, obtain saltpetre powder, after testing, in this saltpetre powder, the purity of saltpetre is 99.99%.
Claims (5)
1. a treatment process for saltpetre waste material, its step is as follows:
A) collect the saltpetre waste material that chemical intensification treatment glass produces, add water mixing, obtains dilution waste liquid, and the saltpetre concentration in described dilution waste liquid is 40%-70%;
B) dilution waste liquid is heated to 50-100 DEG C, until completely dissolved, lysate is removed SODIUMNITRATE by filtration treatment, the filtrate of filtering is down to below room temperature, then carry out dewatering, crystallization, drying, obtain saltpetre powder.
2. the treatment process of saltpetre waste material according to claim 1, it is characterized in that: saltpetre waste material mixes with water according to the mass ratio of 6:3-7 by described step a, must dilute waste liquid, the saltpetre purity in described saltpetre waste material is 80%-99.7%.
3. the treatment process of saltpetre waste material according to claim 1, is characterized in that: the filtrate in described step b adopts ice maker to cool to 0-30 DEG C.
4. the treatment process of saltpetre waste material according to claim 1 and 2, is characterized in that: the lysate in described step b adopts aperture to be the capable filtration of filter membrane of 1-100um.
5. the treatment process of saltpetre waste material according to claim 3, is characterized in that: described filter membrane is softener resin material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510036419.7A CN104609448A (en) | 2015-01-23 | 2015-01-23 | Treatment method for potassium nitrate wastes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510036419.7A CN104609448A (en) | 2015-01-23 | 2015-01-23 | Treatment method for potassium nitrate wastes |
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| CN104609448A true CN104609448A (en) | 2015-05-13 |
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| CN201510036419.7A Pending CN104609448A (en) | 2015-01-23 | 2015-01-23 | Treatment method for potassium nitrate wastes |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106629785A (en) * | 2016-10-09 | 2017-05-10 | 蓝思旺科技(深圳)有限公司 | Method for recovering potassium nitrate from glass reinforcing liquid |
| CN107311205A (en) * | 2017-08-15 | 2017-11-03 | 东旭科技集团有限公司 | The method for purifying potassium nitrate in safety glass waste liquid |
| CN108083300A (en) * | 2017-12-21 | 2018-05-29 | 山西同杰化学试剂有限公司 | A kind of preparation process for industrializing top pure grade potassium nitrate |
| CN108975667A (en) * | 2018-09-29 | 2018-12-11 | 湖南美奥钾业有限责任公司 | A kind of impurity-removing method for the waste nitric acid potassium producing chemically reinforced glass |
| CN114516647A (en) * | 2020-11-19 | 2022-05-20 | 中蓝长化工程科技有限公司 | Method for purifying potassium nitrate from waste potassium nitrate obtained in chemical toughened glass production |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1017320A (en) * | 1996-06-28 | 1998-01-20 | Ube Ind Ltd | Removing method for impurities in sodium nitrate aqueous solution and device therefor |
| CN103318997A (en) * | 2013-06-26 | 2013-09-25 | 昆明理工大学 | Preparation method and application of nano iron-based polyether sulfone (PES) organic-inorganic composite material |
| TWI411579B (en) * | 2011-08-16 | 2013-10-11 | Univ Nat Formosa | A method for purifying potassium nitrate from waste from the glass hardening process |
| CN103466664A (en) * | 2013-09-17 | 2013-12-25 | 蓝思科技股份有限公司 | Fully-automatic production line type potassium nitrate recovering process |
-
2015
- 2015-01-23 CN CN201510036419.7A patent/CN104609448A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1017320A (en) * | 1996-06-28 | 1998-01-20 | Ube Ind Ltd | Removing method for impurities in sodium nitrate aqueous solution and device therefor |
| TWI411579B (en) * | 2011-08-16 | 2013-10-11 | Univ Nat Formosa | A method for purifying potassium nitrate from waste from the glass hardening process |
| CN103318997A (en) * | 2013-06-26 | 2013-09-25 | 昆明理工大学 | Preparation method and application of nano iron-based polyether sulfone (PES) organic-inorganic composite material |
| CN103466664A (en) * | 2013-09-17 | 2013-12-25 | 蓝思科技股份有限公司 | Fully-automatic production line type potassium nitrate recovering process |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106629785A (en) * | 2016-10-09 | 2017-05-10 | 蓝思旺科技(深圳)有限公司 | Method for recovering potassium nitrate from glass reinforcing liquid |
| CN107311205A (en) * | 2017-08-15 | 2017-11-03 | 东旭科技集团有限公司 | The method for purifying potassium nitrate in safety glass waste liquid |
| CN108083300A (en) * | 2017-12-21 | 2018-05-29 | 山西同杰化学试剂有限公司 | A kind of preparation process for industrializing top pure grade potassium nitrate |
| CN108975667A (en) * | 2018-09-29 | 2018-12-11 | 湖南美奥钾业有限责任公司 | A kind of impurity-removing method for the waste nitric acid potassium producing chemically reinforced glass |
| CN114516647A (en) * | 2020-11-19 | 2022-05-20 | 中蓝长化工程科技有限公司 | Method for purifying potassium nitrate from waste potassium nitrate obtained in chemical toughened glass production |
| CN114516647B (en) * | 2020-11-19 | 2023-09-08 | 中蓝长化工程科技有限公司 | Method for purifying potassium nitrate from waste potassium nitrate obtained from production of chemically tempered glass |
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Application publication date: 20150513 |
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